rerddap: General Purpose Client for 'ERDDAP' Servers

General purpose R client for 'ERDDAP' servers. Includes
functions to search for 'datasets', get summary information on
'datasets', and fetch 'datasets', in either 'csv' or 'netCDF' format.
'ERDDAP' information:
<https://upwell.pfeg.noaa.gov/erddap/information.html>.